XR2 again, please help

Mike_G · 21-03-2009, 12:30 PM

I have a litle problem
While stripping my XR2 I discovered that I need to put oversive rollerbearing between crankshaft and connecting rod. Unfortunetly there is no Mercury part like this. Can I use some aftermarket part??
I mean UIM rules are saying that engine has to be 100% stock. Will it be allowed if any examination of the engine??
I'm also making new piston and nicasil sleeves all in stock size.

What do you think about these aftermarket parts if they do not have mercury sign on it??

Cheers,
Mike

Techteam · 21-03-2009, 12:42 PM

No, No, No, No, No..................

You are making new pistons and Nikasil liners ??? For an XR2 ???

Why would you suppose Mercury don't offer an oversize bearing

Would you consider that to be 100% stock

Stop right now. You are wasting your money.

Mike_G · 21-03-2009, 12:49 PM

what can I do then?? I can't afford new crank shaft

Techteam · 21-03-2009, 01:03 PM

I would suspect that there are plenty of XR2 cranks available second hand, Post some pictures of the crank I am interested in taking a look. I understand having a limited budget is difficult but if you are going to the expense of rebuilding I would advise that at least you try and make it reliable.

Andy B · 21-03-2009, 02:36 PM

Quote:

Originally Posted by Mike_G

what can I do then?? I can't afford new crank shaft

you could get it welded and reground,
i've done it before with car engines,
unless there is a reason why not......

Mike_G · 21-03-2009, 03:15 PM

Quote:

Originally Posted by Andy B

you could get it welded and reground,
i've done it before with car engines,
unless there is a reason why not......

Yeah, I was thinkig about it
Have to measure that

Mike_G · 23-03-2009, 02:05 PM

Just measured everything
Nikasil is quite ok
Cranck shaft is also usable

Just need to buy new pistons, rings and bearings

Now I only need service manual with piston dimensions and some other info

Thanks
Mike

wiggy808 · 23-03-2009, 02:33 PM

A few years ago I contacted a few companies with a view to metal spraying and grinding an outboard crank and all of them said they wouldn't guaratee it if it was to be used with roller bearings as opposed to conventional white metal shells.

Sorry for getting off the topic.